Mitsubishi Lancer Evolution 7. Manual — part 253
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-35
DATA LIST REFERENCE TABLE
Item
no.
Check item
Check condition
Normal conditions
01
Wheel speed sensor
<FR>
Execute actual driving.
The speed meter dis-
play and MUT-II dis-
l
t h
02
Wheel speed sensor
<FL>
p y
play match.
03
Wheel speed sensor
<RR>
04
Wheel speed sensor
<RL>
05
Wheel speed sensor
<FR> (0.2 km/h)
06
Wheel speed sensor
<FL> (0.2 km/h)
07
Wheel speed sensor
<RR> (0.2 km/h)
08
Wheel speed sensor
<RL> (0.2 km/h)
09
Vehicle speed
10
Battery voltage
Ignition switch: ON
System voltage
11
Proportional valve cur-
rent <ACD>
During ACD operation
50 - 1,000 mA
12
Proportional valve cur-
rent <AYC>
During AYC operation
50 - 1,000 mA
13
TPS voltage
Ignition switch: ON
Engine: Stopped
Accelerator
pedal:
Full
closed
535 - 735 mV
Engine: Stopped
Accelerator pedal: Press
Gradually rises from
the above value
Accelerator
pedal:
Full
throttle
4,500 - 5,000 mV
14
Longitudinal G sensor
voltage
Ignition switch: ON
Vehicle stopped (horizon-
tal) state
2.4 - 2.6 V
g
Actual driving
The displayed value
increases
and
de-
creases mainly around
2.5 V.
15
Lateral G sensor volt-
age
Ignition switch: ON
Vehicle stopped (horizon-
tal) state
2.4 - 2.6 V
g
Perform actual driving
The displayed value
increases
and
de-
creases mainly around
2.5 V.
16
Steering
operation
angle
Ignition switch: ON
Steering wheel: Steer by 90
degrees to the right
R90 deg
g
Steering wheel: Steer by 90
degrees to the left
L90 deg
17
Steering angle velocity
Ignition switch: ON
Steering wheel: No steering
0 deg/s
g
g
y
g
Steering wheel: Steer
The display changes
according to the revolu-
tion speed.
18
Pressure sensor
During electric pump motor operations
1.0 - 1.6 MPa
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-36
Item
no.
Normal conditions
Check condition
Check item
19
Pressure sensor power
supply
Ignition switch: ON
Approx.5 V
20
Valve power supply
Ignition switch: ON
System voltage
21
Steering wheel sensor
voltage <ST-1>
Ignition switch: ON
Steering wheel: Turn
1 - 2 V and 2.5 - 4.5 V
are displayed alter-
nately.
22
Steering wheel sensor
voltage <ST-2>
Ignition switch: ON
Steering wheel: Turn
1 - 2 V and 2.5 - 4.5 V
are displayed alter-
nately.
23
Steering wheel sensor
lt
ST N
Ignition switch: ON
Steering wheel: Neutral
1 - 2 V
g
voltage <ST-N>
g
Steering wheel: Turn
2.5 - 4.5 V
51
Idle switch
Ignition switch: ON
Accelerator
pedal:
Full
closed
ON
Accelerator pedal: Press
OFF
52
Steering wheel sensor
ST N
Ignition switch: ON
steering wheel: Neutral
ON
g
<ST-N>
g
Steering wheel: Turn from
the neutral position
OFF
53
Steering wheel sensor
<ST-1>
Ignition switch: ON
Steering wheel: Turn slowly
ON and OFF are dis-
played alternaltely.
54
Steering wheel sensor
<ST-2>
Ignition switch: ON
Steering wheel: Turn slowly
ON and OFF are dis-
played alternately
55
Steering wheel sensor
learning <ST-N>
Perform actual driving
Steering wheel sensor neu-
tral position learning exe-
cuted
ON
Steering wheel sensor neu-
tral position learning unex-
ecuted
OFF
56
Stop lamp switch
Ignition switch: ON
Brake pedal: Depress
ON
p
p
g
Engine: Stopped
Brake pedal: Release
OFF
57
Motor monitor
Electric pump motor is currently operating
ON
Electric pump motor is currently not operating
OFF
58
Oil pressure state
Electric pump motor is currently operating
LOW
p
Electric pump motor is currently not operating
HIGH
59
Directional valve
Ri ht
AYC clutch right side is currently operating
ON
<Right>
AYC clutch right side is currently not operating
OFF
60
Directional valve
L ft
AYC clutch left side is currently operating
ON
<Left>
AYC clutch left side is currently not operating
OFF
61
ABS monitor
ABS is currently operating
ON
ABS is currently not operating
OFF
62
Parking brake switch
Ignition switch: ON
Parking brake lever: Pull
ON
g
g
Engine:Stopped
Parking brake lever: Re-
lease
OFF
63
ACD mode switch
Ignition switch: ON
ACD mode switch: Press
ON
g
Engine:Stopped
ACD mode switch: Release
OFF
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-37
ACTUATOR TEST JUDGEMENT VALUE
Item
no.
Check item
Test description
Normal state
01
Bleeding <ACD>
Input current to the Proportional valve
according to the steering angle, and operate
the Proportional valve for five minutes.
Make sure no air leaks from the bleeder
screw on the transfer.
02
Bleeding <AYC>
Input current to the Proportional valve
according to the steering angle, and operate
the directional valve for five minutes.
Make sure no air leaks from the bleeder
screw on the torque transfer differential.
03
Check the oil vol-
ume
Operate the directional valve to the left and
right for 20 seconds.
Check that the oil volume of the reservoir
tank is appropriate.
04
Electric
pump
drive
Operate the electric pump for 5 seconds.
Operation sounds of the electric pump
can be heard.
05
Check the opera-
tions of the ACD
Operate the Proportional valve <ACD> and
supply the maximum oil pressure to the multi
plate clutch.
9Generate the tight corner braking
phenomenon.
06
Check clutch op-
erations <Left>
Operate the direction valve and supply the
maximum oil pressure to the left clutch.
When the wheels are lifted, speed
difference will occur between the rear
left and right wheels.
07
Check clutch op-
erations <Right>
Operate the direction valve and supply the
maximum oil pressure to the right clutch.
When the wheels are lifted, speed
difference will occur between the rear
left and right wheels.
08
Control OFF
Turn OFF the electric pump relay, and turn
OFF the control of the ACD and AYC.
In actual driving, there is difference
between control ON and OFF.
(1) The actuator test can be executed only when all the following conditions are satisfied.
D
All wheel speed sensor inputs below 20 km/h
D
No system malfunction detected
D
Steering angle is within ±30 degrees from the neutral position
(2) When the actuator test corresponds to one of the following conditions, forced driving will be cleared.
D
When any one of the wheel speed sensor input is detected to be above 20 km/h (excluding
Item No.08 “Control OFF”.)
D
When system malfunction is detected (excluding diagnostic code No.82, 84, and 85)
D
When the forced drive time is exceeded
D
When the MUT-II is removed
D
When the Clear key of the MUT-II is operated
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-38
CHECK AT 4WD-ECU TERMINALS
NOTE:
1. *
1
indicates the eliminated terminal when only ACD is installed.
2. *
2
indicates the terminal added when only ACD is installed.
Termi-
nal no.
Check item
Check condition
Normal state
1
Proportional
valve
<ACD>
Operate the Proportional
valve in the actuator test
While executing the actuator test
System voltage
<ACD>
valve in the actuator test
(Item No.01). <ACD>
After completing the actuator test
1 V or less
3*
1
Proportional
valve
<AYC>
Operate the Proportional
valve in the actuator test
While executing the actuator test
System voltage
<AYC>
valve in the actuator test
(Item No. 02). <AYC>
After completing the actuator test
1 V or less
6
Wheel speed sensor
FL
Vehicle is stopping
1 V or less
p
<FL>
Moving forward slowly
0 ↔ 5 V flushing
7
Wheel speed sensor
RR
Vehicle is stopping
1 V or less
p
<RR>
Moving forward slowly
0 ↔ 5 V flushing
8
Wheel speed sensor
RL
Vehicle is stopping
1 V or less
p
<RL>
Moving forward slowly
0 ↔ 5 V flushing
9
Wheel speed sensor
FR
Vehicle is stopping
1 V or less
p
<FR>
Moving forward slowly
0 ↔ 5 V flushing
10
Pressure sensor earth
Any time
1 V or less
11
Lateral G sensor
Ignition switch: ON
Vehicle horizontal state
2.4 - 2.6 V
13
4WD-ECU power sup-
l
Ignition switch: OFF
0 V
p
p
ply
Ignition switch: ON
System voltage
14*
1
Directional
valve
<Right>
Operate the directional
valve <right> in the
While executing the actuator test
System voltage
<Right>
valve <right> in the
actuator test (Item No.
07)
After completing the actuator test
1 V or less
15*
1
Directional
valve
<Left>
Operate the directional
valve <left> in the actua
While executing the actuator test
System voltage
<Left>
valve <left> in the actua-
tor test (Item No. 06)
After completing the actuator test
1 V or less
16
Electric pump relay
l
When the electric pump motor is not operating
0 V
p
p
y
power supply
While the electric pump motor is operating
System voltage
19*
2
Wheel speed sensor
earth <FL>
Any time
1 V or less
20*
2
Wheel speed sensor
earth <RR>
Any time
1 V or less
21*
2
Wheel speed sensor
earth <RL>
Any time
1 V or less
22*
2
Wheel speed sensor
earth <FR>
Any time
1 V or less
23
Longitudinal G sensor
Ignition switch: ON
Vehicle horizontal state
2.4 - 2.6 V
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